Good denial management is a weekly routine, not a one-off project. Log every denial with its reason code, work the ones with the nearest deadline and the most money first, appeal with evidence, and fix the step that caused each denial that repeats. A practice can start all of that this week, with the staff and software it already has.
It is worth the time. MGMA puts practices' first-submission denials at 7% to 8% over the past four years, and says practices can push that below 5% with targeted process fixes. If you want to know why claims get denied in the first place, start with the top reasons medical claims are denied. This post is about the process that handles them.
1. Log every denial with its reason code
You can't fix what you can't count. Every denial arrives on the remittance (the ERA or paper EOB) with a group code and a claim adjustment reason code (CARC), often with a remark code that adds detail. The codes are public and maintained by X12.
A shared spreadsheet is enough to start. One row per denied claim line, with these columns:
- Date received and payer
- Claim number (not the patient's name, so the log stays out of email and chat)
- Group and reason code, plus any remark code
- Amount denied
- Appeal or resubmission deadline
- Who owns it, and the outcome
A few of the codes you will see most:
Code | What the payer is saying | Usual next step |
|---|---|---|
CO-16 | The claim is missing information or has a billing error | Read the remark code, correct and resubmit |
CO-27 | The service was after coverage ended | Check coverage, bill the right payer or the patient |
CO-4 | The procedure code doesn't match its modifier | Correct the modifier and resubmit |
CO-97 | The service is paid as part of another one already paid | Check the bundling edit; close it if the payer is right |
CO-29 | The filing deadline has passed | Appeal only with proof of timely filing |
CO-50 | The payer doesn't consider it medically necessary | Appeal with the documentation that shows it was |
The two letters before the number are the group code: CO is a contractual obligation, PR is patient responsibility and OA is any other adjustment. Our denial management page has a tool, The denial decoder, that explains each common code and how it is usually worked: see it on the denial management page.
2. Work the queue by deadline, then by dollars
Every denial has a clock. For Medicare, a first appeal (a redetermination) must be filed within 120 days of receiving the initial determination. Commercial payers set their own limits in their provider contracts and manuals. Put each payer's appeal and corrected-claim limits at the top of your log.
Then sort: nearest deadline first, and within the same week, the largest amounts first. A $40 denial with three months left can wait; a $900 one with ten days left can't.
Keep rejections separate. A rejected claim failed the clearinghouse or payer checks and was never processed, so there is nothing to appeal: correct it and resend it the same day.
3. Decide: correct, appeal or close
Each denial gets one of three outcomes, and the log should say which and why.
- Correct and resubmit when the error was yours: a wrong member ID, a missing modifier, a missing referring provider.
- Appeal when the payer got it wrong, or when the notes support what was billed: a medical necessity denial on a well-documented visit, or a timely filing denial you can disprove.
- Close it, with a reason, when the payer was right, for example a service correctly bundled into another. Writing it off is fine. Writing it off without a recorded reason means you'll never learn from it.
4. Write appeals that stand on evidence
An appeal letter should fit on one page: the claim and its identifiers, what was denied, why the denial is wrong, and the rule that supports you, such as the payer's own policy or a Medicare coverage determination. Attach only the records that support the claim, not the whole chart.
Keep proof of everything you send: the portal confirmation, the fax receipt or the mailing record. For timely filing appeals, the clearinghouse acceptance report is usually the proof, so keep it for every claim.
5. Fix the cause upstream, every time it repeats
A denial worked is one claim paid. A cause fixed is every future claim like it. When the same reason code shows up again, trace it back to the step that produced it:
- Coverage and registration denials (CO-27, CO-16 for a bad member ID) start at the front desk. Check eligibility before every visit, and scan both sides of the insurance card at each one.
- Coding denials (CO-4, CO-97) go back to whoever codes, with the denial and the payer's rule attached.
- Documentation and medical necessity denials (CO-50) go back to the provider, with the specific note the payer found lacking.
6. Hold a 30-minute denial review every week
Get the front desk, whoever codes and whoever bills in the same room or call, once a week. Keep to one agenda:
- The top three denial reasons since last week, by payer.
- Any new reason code you haven't seen before.
- One fix, assigned to one person, with a date.
Thirty minutes is enough. The point is that the front desk hears about the denials it caused, and the fix has a name next to it.
7. Track four numbers each month
- Denial rate: claims denied on first submission, divided by claims submitted.
- Denials by reason and payer: where they cluster.
- Appeal success rate: appeals won, divided by appeals filed.
- Written off to denials: dollars closed without payment, and why.
What denials cost: a worked example
MGMA has put the average cost to rework a claim at $25.20. For example, a practice that sends 1,000 claims a month with a 7.5% denial rate has 75 denials a month. At $25.20 each, that is $1,890 a month, or $22,680 a year, in rework alone, before counting any denial that is never paid. At a 5% denial rate the same practice reworks 50 claims a month, about $15,120 a year.
Our free denial cost calculator does the same sum with your own claim volume, denial rate and average payment.
Your first week: a checklist
- Monday: start the denial log and enter every denial from the last 30 days.
- Tuesday: add each payer's appeal and corrected-claim deadlines.
- Wednesday: sort by deadline and amount, and work the top ten.
- Thursday: find your most frequent reason code and trace it to its step.
- Friday: hold the first 30-minute review and assign one fix.
Where Beeline fits
Beeline's denial management service reads each denial's codes, routes it to the person who fixes that kind of problem, corrects, resubmits or appeals it, and traces repeat denials back to the step that caused them. You see denials by reason and payer, open appeals and their deadlines each month. Try The denial decoder on our denial management page, or book a free consultation.
Frequently Asked Questions
What is denial management in healthcare?
The work of finding out why a payer refused a claim, correcting or appealing it within the payer's deadline, and fixing the cause so the same denial doesn't come back.
What is the difference between a rejected and a denied claim?
A rejected claim failed the clearinghouse or payer checks before it was processed, so it is corrected and resent. A denied claim was processed and the payer refused to pay all or part of it, so it needs a correction, a reconsideration or an appeal.
How long do we have to appeal a denied claim?
For Medicare Part A and Part B, a redetermination must be filed within 120 days of receiving the initial determination. Commercial payers set their own limits in their contracts and provider manuals, so check each one.
How often should we review denial trends?
Weekly for the working queue and the top reasons, monthly for the four numbers. A monthly review alone lets a new problem run for weeks before anyone sees it.
Do we need denial management software?
Not to start. A shared log with the columns above, sorted by deadline, covers a small practice. Software helps once the volume makes the spreadsheet hard to keep current.